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forum threadCRSRx posted Yesterday 3:16 PM

A.O. Smith Signature Series 6.6-GPM 160000-BTU Indoor Natural Gas Ultra-Low NOx Tankless Water Heater Stainless Steel one_size | GT15-240-NI $609

$609

$1,218

50% off
Lowe's
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Looks like a good deal. I currently have a Takagi tankless which has been wonderful. I believe the AO Smith line is made by Takagi.

https://www.lowes.com/pd/A-O-Smit...ccQAvD_BwE
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Looks like a good deal. I currently have a Takagi tankless which has been wonderful. I believe the AO Smith line is made by Takagi.

https://www.lowes.com/pd/A-O-Smit...ccQAvD_BwE

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Model: AO Smith Signature Series 6.6GPM 16kBTU Gas Tankless Water Heater GT15-240

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Sort: Lowest to Highest | Last Updated 7/18/2026, 03:17 PM
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Lowe's$609

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4 Comments

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Yesterday 3:24 PM
112 Comments
Joined Mar 2009
DrLaxYesterday 3:24 PM
112 Posts
Except for the label, it looks exactly like my Takagi tankless. Same 15-year heat exchanger guarantee, 5-year parts guarantee as Takagi.
Last edited by DrLax July 18, 2026 at 08:28 AM.
Yesterday 5:30 PM
285 Comments
Joined Feb 2008
poorSAPYesterday 5:30 PM
285 Posts
Are these more efficient than a tank water heater? I read they need to be cleaned on a yearly basis
Yesterday 7:18 PM
6 Comments
Joined Feb 2024
nhantdbYesterday 7:18 PM
6 Posts
plus $79 delivery
Yesterday 9:18 PM
1.7K Comments
Joined Oct 2006
bjammYesterday 9:18 PM
1,694 Posts
Quote from poorSAP :
Are these more efficient than a tank water heater? I read they need to be cleaned on a yearly basis
Yes this one says its 94% efficient (meaning 94 percent of the energy used is to heat water and only 6% is lost elsewhere). You're also only heating water on demand instead of keeping it hot at all times. Its recommended to flush them yearly but some of the newer models out now have some kind of scale inhibitor so its not required anymore but still recommended to extend life.

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